Device for buffing matrices for type-casting machines



Dec. 1, 1925- G. s. PROBERT DEVICE FOR BUFFING MATRICES FOR TYPE CASTING MACHINES Filed March 28, 1924 {A ATTORNEY Patented Dec. 1, 1925.

GEORGE S. PROBERT, OF DAYTON, OHIO.

DEVICE FOR BUFFING MATRICES FOR TYPE-CASTING MACHINES.

Application filed March 28 To a?! whom 2'15 may concern.

Be it known that I, GEORGE S. Pnosnu'r, acitizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful IIDPi'OVGIIlQIltS in Devices for Bailing Matrices for Type-Casting 1.4a chines, of which the following is aspecification.

This invention relates to new and useful improvements in devices for buffing or cleaning matrices for type-casting machines.

Matrices, through use in line-casting and similar machines, become so dirty and dis colored that theidentifying characters such as letters or numbers on them are difficult to read. It is, therefore, the principal object of my invention to provide simple and economical means for automatically and regularly cleaning the identifying character part of the matrix so that it will at all times be plainly visible to the operator, thereby enabling him to catch mistakes that might otherwise go unnoticed, for he relies on the identifying character of the matrix to ascertain if his assembly is correct.

It is another object of my invention to provide a matrix buffer that may be readily attached to the delivery channel plate or other part of a type-casting machine which the matrices pass, for the purpose of engaging and cleaning those parts of them which display the identifying characters.

In the accompanying drawings, Figure 1 is a front elevational view of my matrix buffer attached to a type-casting machine. Figure 2 is a longitudinal, sectional view thereof, taken on the line 22 of Figure 1. Figure 3 is a plan view of the buffer applied to the machine. And Figure 4 is a perspective view of a matrix bar for the lower case letter h, showing how the surface on which said letter appears has been cleaned by my buffer.

Referring to the accompanying drawings for a detailed description of my invention, the numeral 1 designates a delivery channel plate, and the numerals 2, 2 a pair of transfer slides, on a type-casting machine of a common type. Longitudinally movable between the transfer slides 2, 2, are matrices 3, the matrix shown in the drawings being that for forming the lower case letter 11.

In order that the identifying character imprint surface on each matrix may be kept 1924. Serial No. 702,700.

clean at all times, so that the character for which it stands may not be obscured by dirt and grease, I have provided the following means: To house the latter any suitable frame such as the U-shaped frame 4, preferably formed of a strip of steel, is provided, the inner ends of said frame being bent at right angles to the body part of the frame to form feet 5, 5 .in the outer ends of which notches 6, 6 respectively are formed. These notches 6. 6 face in opposite directions so that the frame 4 may be turned to fit them to screws 7, 7 respectively that enter tapped holes in the channel delivery plate 1. These screws 7, 7 may be located at any suitable place on the channel plate 1 that the matrices 3 pass during their longitudinal movement, to bring the means now to be described in position to engage and clean their identifying character surfaces.

Formed in the delivery channel plate 1 opposite the inner central portion of the frame 4, is a hole 8 through which and a hole in the adjacent transfer slide there projects from said frame, for engagement with the matrices 3 as they pass it, a buffing member 9 preferably constructed of rubber. At its rear end the rubber member 9 is of increased thickness for reception between two plates 10 and 11 which are free to slide over the edges of the legs of the frame 4. The inner end of the member 9 is firmly secured between said plates by screws 12, 12 to the threaded ends of which nuts 13, 13 respectively are applied. (See Figures 2 and 3.)

At its outer end the plate 10 terminates in an inwardly projecting tongue 14 that is freely movable between the legs of the frame 4 for a purpose now to be described. Fixedly secured in a middle hole'in said tongue is the reduced end of a rod 15 that projects outwardly through a hole in the head 16 of the frame 4. Between the head 16 of the latter and the tongue 14 on the plate 10 a helical spring 17 surrounds the rod 15. The outer end of the said rod 15 is threaded to receive a knurled adjusting nut- 18 which, when turned in one direction, will draw the plates 10 and 11 outwardly against the com- =pression of said spring 17 and when turned in the opposite direction, the spring will force the plates inwardly to cause the inner end of the rubber 9 to press more firmly against the character surfaces of the mat rices when they pass it. By means of this adjustment the rubber 9 will be positioned to project through the holes in the channel delivery plate and transfer slide a sufficient distance to properly engage the identifying character sides of the matrices 3 for the purpose of thoroughly cleaning them.

Projecting into said holes in the channel plate and transfer slide for downward pressure upon the engaging end of the buffing member or rubber 9, is a flat spring 19, the outer end of which is turned upwardly and contains a central hole through which a screw 20 is passed into a tapped hole in the channel plate to firmly secure said spring to the latter. (See Figures 1 and 2.)

It will now be seen that whenever a matrix 3 passes the inner end of the rubber 9, it will be engaged by the latter to clean dirt and grease from its identifying character surface. It is to be understood that the term character includes'letter s, numbers, punc tuation marks and other designations for which the matrices stand. An identifying letter after it has been cleaned or polished by my bufling means, is shown on the matrix in Figure 4:. When the letter or other charactor is so cleaned, it will always beplainly visible to the operator.

I do not Wish to be limited to the details of construction and, arrangement herein shown and described, and any changes or modifications maybe made therein within the scope of the subjoined claim,

Having described my invention, I claim:

In a typecasting machine including a delivery channel plate having tapped holes, a pair of transfer slides adapted" to support matrices longitudinally movable between them, each matrix having an identifying character on one side, a U-shaped frame formed with righteangled feet containing notches facing in opposite directions, screws fitting said notches'adapted to be passed into the tapped holes in said channel delivery plate, said slide and plate having registering holes opposite the middle inner portion of said frame, a pair of plates movable along the longitudinal edges of said frame, a buffer member secured between said plates for'projection through said holes to engagethe identifying character surfaces on said matrices, one of said plates having an inwardly projecting tongue for movement between the legs of said frame, said frame having a hole in its outer end, a rod secured to said tongue for projection through the hole in the outer end of said frame, a spring coiled around said rod between the outer endof the frame and said tongue, said rod being threaded at its outer end, and an adjusting-'nut'on' the outer threaded end of said rod for the 'purpose specified.

In testimony whereof I have hereunto set my hand this 27th day of March, 1924:.

GEORGE s. P R BERT. 

